Question

Answer any four questions from 19 (i) to 19 (v)
Electrical resistivity of some substances at 20°C are given below:
A=1.60x10-18mm
B= 1.62x10-8pm
C= 5.20x10- nm
D= 10.0x10-8nm
E= 94.0x10 nm
F= 10.0x10 nm​

Answer 1

Answer:

The general rule is resistivity increases with increasing temperature in conductors and decreases with increasing temperature in insulators.

The question is incomplete,

inbōx me the complete question

i will provide you the correct answer.

And if it is electrical resistance,

use the formula,

R = R(v20) [ 1 + alpha ( T - T(v20) ) ]

in the formula, R(v20) & T(v20) are Resistance and temperature at 20°C respectively

alpha is temperature coefficient of resistance